Malicious PDF — malware analysis report

Static analysis result for SHA-256 e64255215f904e73…

MALICIOUS

PDF

76.0 KB Created: 2021-03-15 19:25:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 147a4fbcb81a15d661dc0be3c8b31084 SHA-1: 50a677d28fabf5538f5bb0d0ab0de67e8646ba8d SHA-256: e64255215f904e73b9dcd4817fd14b9a288de6efc77fe3cabfebe0c48a60e8d2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crophysi.ru/strik?utm_term=precuela+de+los+juegos+del+hambre+2020 PDF link annotation
    • http://kifejuja.medianewsonline.com/27326805852.pdfIn PDF document text
    • http://futajef.medianewsonline.com/nodefomevudikutobudokix.pdfIn PDF document text
    • http://reduslim-italy.site/tekuvu6flhm.pdfIn PDF document text
    • http://kosamaritaj.getenjoyment.net/36083613221.pdfIn PDF document text
    • https://tevumusavobe.weebly.com/uploads/1/3/4/1/134108657/vafewezamaleg-wifag.pdfIn PDF document text
    • http://sarkife.site/aptitude_tricks_for_placementsl3x3o.pdfIn PDF document text
    • https://fojowixejomad.weebly.com/uploads/1/3/2/6/132681658/kezotedojibu_tejiro.pdfIn PDF document text
    • http://sberin.xyz/world_war_game_download_freec4jqz.pdfIn PDF document text
    • http://yourdesk.website/7823413729mo107.pdfIn PDF document text
    • https://cdn.sqhk.co/seworani/dHjeihf/29870235155.pdfIn PDF document text
    • http://newuwedeza.mypressonline.com/what_calorie_deficit_is_recommended_for_weight_loss_quizlet.pdfIn PDF document text
    • https://butegipabozu.weebly.com/uploads/1/3/4/2/134235803/wimuzemupev_davukonipajubi_vimefipogu.pdfIn PDF document text
    • https://gikesusemu.weebly.com/uploads/1/3/4/7/134775173/6f17122994aa.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/fgejjhh/pocket_rally_full_apk_indir.pdfIn PDF document text
    • http://lishop.site/master_bill_of_lading_samplerr69p.pdfIn PDF document text
    • https://cdn.sqhk.co/mawedabe/hbibhiJ/pusajagojatevog.pdfIn PDF document text
    • https://dakewamegiru.weebly.com/uploads/1/3/5/3/135305658/7bedf1cf1614.pdfIn PDF document text
    • https://cdn.sqhk.co/ketixudolu/MWhhhgL/bsc_full_form_in_medical.pdfIn PDF document text
    • https://cdn.sqhk.co/gosukutusu/jbbjfI3/54173940920.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/28626584901.pdfIn PDF document text
    • http://kogotiru.myartsonline.com/botany_multiple_choice_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/10799489906.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/baritone_ukulele_lessons.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE827 5844 bytes
SHA-256: dadf428203af477dff5444ab22d284cc239543e4654b3ae52bfbb4621bba0a5d
font_01_sfnt_off0000fbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE4 11240 bytes
SHA-256: d72e54d81eef6056f2a24844cdfa9f77710e92959cd2d14d0cce9ffd561b1745

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